Today, the term stylus often refers to an input method usually used in PDAs, graphics tablets, Tablet PCs, and UMPCs. In this method, a stylus that secretes no ink touches a touch screen instead of a finger to avoid getting the natural oil from one's hands on the screen. It also improves precision of touch, allowing use of smaller interface elements. Stylus may be used for handwriting or drawing on the screen. Styli are also used with the Nintendo DS handheld gaming device, which has two screens, the bottom one being touch-sensitive.